142180517 has 2 divisors, whose sum is σ = 142180518. Its totient is φ = 142180516.

The previous prime is 142180483. The next prime is 142180531. The reversal of 142180517 is 715081241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89094721 + 53085796 = 9439^2 + 7286^2 .

It is a cyclic number.

It is not a de Polignac number, because 142180517 - 2⁶ = 142180453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142180517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142180817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71090258 + 71090259.

It is an arithmetic number, because the mean of its divisors is an integer number (71090259).

Almost surely, 2^142180517 is an apocalyptic number.

It is an amenable number.

142180517 is a deficient number, since it is larger than the sum of its proper divisors (1).

142180517 is an equidigital number, since it uses as much as digits as its factorization.

142180517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 142180517 is about 11923.9472071961. The cubic root of 142180517 is about 521.9313251600.

The spelling of 142180517 in words is "one hundred forty-two million, one hundred eighty thousand, five hundred seventeen".